Filter material



FIG. 1 is a front view of a filter material showing our new design;

FIG. 2 is a cross-sectional view thereof, taken along line 2—2 of FIG.1;

FIG. 3 is a front view of a second embodiment of our new design;

FIG. 4 is a cross-sectional view thereof, taken along line 4—4 of FIG.3;

FIG. 5 is a front view of a third embodiment of our new design;

FIG. 6 is a cross-sectional view thereof, taken along line 6—6 of FIG.5;

FIG. 7 is a front view of a fourth embodiment of our new design;

FIG. 8 is a cross-sectional view thereof, taken along line 8—8 of FIG.7;

FIG. 9 is a front view of a fifth embodiment of our new design;

FIG. 10 is a cross-sectional view thereof, taken along line 10—10 ofFIG. 9;

FIG. 11 is a front view of a sixth embodiment of our new design;

FIG. 12 is a cross-sectional view thereof, taken along line 12—12 ofFIG. 11; and,

FIG. 13 is a rear view of the filter material, which is identical forall six embodiments.

The ornamental design for a filter material, as shown and described.